Hi i am having problems using the Uart 0 with the sdk c# on my ez-b v4 i am writing a standalone app as well as a plugin for my inmoov bot, as i only have one ez-b v4 (limited funds) i am using an stm32F429 discovery board i had lying around to operate the additional servos and neopixel ring. The F429 disco board is working fine and i can send a simple command from the ez-b the protocol is just 4 bytes [0xFE][command byte][servonum byte][value byte] and works fine at 115200 F429 recieves the commands without any problems but i then send back either the same 4 bytes to acknowledge a set command or with a changed value byte if requesting a value from the F429 i have the following code set up in C# to wait for the response but it always returns the same value of 239 0xef in both my standalone version and the plugin version the F429 is sending correctly as i have connected it to an arduino , Nulceo stm32F746 and Nucleo stm32F401 and they all receive the 4 bytes correctly. i suspect i am doing something wrong as the _ezb.Uart.UARTExpansionAvailableBytes always seems to return 4086 once i send it data from the F429 I have been struggling with this for a couple of days now so any help would be appreciated am i using the right command to read the data?

private byte[] waitforresponse(int port) { // start timeout timer timeoutTimer.Enabled = true; TimedOut = false; // here to debug uart rx problem // bytes = 0 first time though the loop int bytes = _ezb.Uart.UARTExpansionAvailableBytes(port); while ((_ezb.Uart.UARTExpansionAvailableBytes(port) < 4) && (TimedOut == false)) {

            Application.DoEvents();
        }
        timeoutTimer.Enabled = false;
        // here to debug uart rx problem
        // bytes = 0 first time though the loop

        bytes = _ezb.Uart.UARTExpansionAvailableBytes(port);
        if (TimedOut == false)
        {
            // original code return 4 bytes all with 239 0xEF
            //byte[] data = _ezb.Uart.UARTExpansionRead(port, 4);
           
            // added this for debug 
            // reads 4086 bytes all of the same value 239 0xEF
            byte[] data = _ezb.Uart.UARTExpansionReadAvailable(port);
            return data;
        }
        else
        {
            return null;
        }
    }